Tag Archive for 'Gaia satellite'

An impression of the encounter between the Milky Way and the Sausage dwarf galaxy. Image credit: V. Belokurov / Juan Carlos Muñoz / ESO.

‘Sausage’ Galaxy Crashed into Milky Way 8-10 Billion Years Ago

Jul 5, 2018 by News Staff

An unknown dwarf galaxy, dubbed ‘Sausage’ galaxy, smashed into our own Milky Way Galaxy around 8 to 10 billion years ago, a team of astronomers suggests....

Gaia’s all-sky view of our Milky Way Galaxy and neighboring galaxies, based on measurements of nearly 1.7 billion stars. Brighter regions indicate denser concentrations of especially bright stars, while darker regions correspond to patches of the sky where fewer bright stars are observed. The color representation is obtained by combining the total amount of light with the amount of blue and red light recorded by Gaia in each patch of the sky. The bright horizontal structure that dominates the image is the Galactic plane, the flattened disc that hosts most of the stars in our home Galaxy. In the middle of the image, the Galactic center appears vivid and teeming with stars. Darker regions across the Galactic plane correspond to foreground clouds of interstellar gas and dust, which absorb the light of stars located further away, behind the clouds. Many of these conceal stellar nurseries where new generations of stars are being born. Sprinkled across the image are also many globular and open clusters -- groupings of stars held together by their mutual gravity, as well as entire galaxies beyond our own. The two bright objects in the lower right of the image are the Large and Small Magellanic Clouds, two dwarf galaxies orbiting the Milky Way. In small areas of the image where no color information was available -- to the lower left of the Galactic center, to the upper left of the Small Magellanic Cloud, and in the top portion of the map -- an equivalent grayscale value was assigned. Image credit: ESA / Gaia / DPAC.

ESA’s Gaia Mission Releases Catalog of Nearly 1.7 Billion Stars

Apr 26, 2018 by News Staff

ESA’s Gaia mission has released the largest catalogue ever of Milky Way stars. It includes the positions on the sky for approximately 1.7 billion stars,...

2014 MU69, the next flyby target of NASA’s New Horizons spacecraft, might have a moon. Image credit: NASA / JHUAPL / SwRI.

Kuiper Belt Object 2014 MU69 Might Have a Small Moon

Dec 29, 2017 by News Staff

The upcoming encounter of NASA’s New Horizons spacecraft with 2014 MU69 will be an important and rare opportunity for close-up study of a Kuiper Belt...

This image, taken with the Wide Field Imager camera on the 2.2-m MPG/ESO telescope at ESO’s La Silla Observatory in Chile, shows the Sculptor dwarf galaxy. Image credit: ESO.

3D Motions of Stars in Sculptor Dwarf Galaxy Hint at Underlying Dark Matter

Nov 28, 2017 by News Staff

Based on the combination of data taken 12 years apart by the NASA/ESA Hubble Space Telescope and ESA’s Gaia mission, astronomers have pinned down for...

SDSS DR14 image of the massive spiral galaxy NGC 3191; the cross-hairs mark the position of SN 2017egm. Image credit: SDSS.

SN 2017egm: ‘Heavy Metal’ Superluminous Supernova Discovered in NGC 3191

Aug 1, 2017 by News Staff

At a distance of 420 million light-years, the recently-discovered SN 2017egm is the nearest Type I superluminous supernova to date, and the first near...

Artist’s impression of two hypervelocity stars speeding from the center of the Milky Way to its outskirts. Image credit: ESA / CC BY-SA 3.0 IGO.

ESA’s Gaia Satellite Spots Six Hypervelocity Stars

Jul 2, 2017 by News Staff

With the help of an artificial neural network, ESA’s Gaia satellite spotted six hypervelocity stars — stars whose velocity in the rest frame of...

The Large and Small Magellanic Clouds, their stellar halos and the RR Lyrae bridge: pale white veils and the narrow bridge between the Clouds represent the distribution of the RR Lyrae stars detected with the data from ESA’s Gaia satellite. Image credit: V. Belokurov / D. Erkal / A. Mellinger.

43,000-Light-Year-Long Stellar Bridge Connects Magellanic Clouds

Feb 8, 2017 by News Staff

The Large and Small Magellanic Clouds — the largest and most well-known dwarf galaxies in the Milky Way’s orbit — are connected by a 43,000...

ESA Releases Gaia’s Billion-Star Map of Milky Way Galaxy

Sep 15, 2016 by News Staff

On its way to assembling the most detailed 3D map ever made of our Galaxy, ESA’s Gaia spacecraft has pinned down the precise position on the sky and...

Gaia 14aae: Astronomers Discover Unique Binary Star

Jul 17, 2015 by News Staff

Using ESA’s Gaia satellite, a large multinational group of astronomers has discovered a unique binary star system: the first known such binary where...

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